A new reaction of mesoionic 1,3,4-thiadiazoles. Attempted cycloaddition with dimethyl acetylenedicarboxylate
作者:Robert M. Moriarty、Anton Chin
DOI:10.1039/c3972001300a
日期:——
Treatment of various mesoionic 1,3,4-thiadiazoles with dimethyl acetylenedicarboxylate yields tetramethylthiophen tetracarboxylate and the S-cyanothioimidate derivative; a mechanism involving fragmentation of the mesoionic ring is suggested.
用乙炔二羧酸二甲酯处理各种内消旋的1,3,4-噻二唑,得到四甲基噻吩四羧酸酯和S-氰基硫代亚氨酸酯衍生物。提出了涉及中离子环断裂的机理。